"David Fontaine" <dav### [at] faricynet> wrote :
>> It's just an intersection of twelve planes in the form Ax+By+Cz. With a> dodecahedron I believe it is possible to orient it in such a way that> each plane only requires two of these components.
http://www.shianet.org/~reneenew/calc.html might tell you why the
phrase "it's just" made me chuckle...